/* ============ Reset & Base ============ */
*,*::before,*::after{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:'Noto Sans JP','Inter',-apple-system,BlinkMacSystemFont,sans-serif;
  line-height:1.7;
  color:#0F172A;
  background:#FFFFFF;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none;transition:all .2s ease}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.01em}
p{margin:0}
ul{list-style:none;padding:0;margin:0}

/* ============ Variables ============ */
:root{
  --brand:#0F172A;
  --brand-2:#1E293B;
  --accent:#3B82F6;
  --accent-2:#60A5FA;
  --accent-green:#10B981;
  --text:#0F172A;
  --text-sub:#64748B;
  --bg-1:#F8FAFC;
  --bg-2:#EEF2F7;
  --line:#E2E8F0;
  --line-strong:#CBD5E1;
  --line-feature:#3B82F6;
  --white:#FFFFFF;
  --shadow:0 4px 20px rgba(15,23,42,.06);
  --shadow-lg:0 10px 40px rgba(15,23,42,.12);
  --radius:14px;
  --radius-lg:20px;
}

/* ============ Layout ============ */
.container{max-width:1120px;margin:0 auto;padding:0 24px}
section{padding:96px 0}

/* ============ Header ============ */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:72px}
.logo{display:flex;align-items:center;gap:8px;font-weight:900;font-size:22px;color:var(--brand)}
.logo-mark{color:var(--accent);transform:rotate(45deg);display:inline-block;font-size:16px}
.logo-tld{color:var(--text-sub);font-weight:500;font-size:14px;margin-left:2px}
.nav-desktop{display:flex;align-items:center;gap:32px;font-weight:600;font-size:15px}
.nav-desktop a:not(.btn-nav-cta):hover{color:var(--accent)}
.btn-nav-cta{
  background:var(--brand);color:var(--white)!important;
  padding:10px 20px;border-radius:999px;
  font-size:14px;
}
.btn-nav-cta:hover{background:var(--accent)}
.nav-toggle{display:none;background:none;border:none;padding:8px;cursor:pointer;flex-direction:column;gap:5px}
.nav-toggle span{display:block;width:24px;height:2px;background:var(--brand)}

/* ============ Hero ============ */
.hero{
  position:relative;
  padding:120px 0 100px;
  overflow:hidden;
  background:linear-gradient(135deg,#0F172A 0%,#1E293B 100%);
  color:var(--white);
}
.hero-bg{
  position:absolute;inset:0;
  background:
    radial-gradient(circle at 15% 30%,rgba(59,130,246,.35),transparent 45%),
    radial-gradient(circle at 85% 70%,rgba(96,165,250,.25),transparent 50%);
  pointer-events:none;
}
.hero-inner{position:relative;z-index:1;text-align:center}
.hero-badge{
  display:inline-block;
  padding:6px 16px;
  background:rgba(59,130,246,.15);
  border:1px solid rgba(96,165,250,.4);
  border-radius:999px;
  font-size:13px;font-weight:600;
  color:#BFDBFE;
  margin-bottom:24px;
  letter-spacing:.05em;
}
.hero-title{
  font-size:clamp(32px,6vw,64px);
  line-height:1.25;
  margin-bottom:24px;
  font-weight:900;
}
.hero-title-accent{
  background:linear-gradient(90deg,#60A5FA,#3B82F6);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.hero-sub{
  font-size:clamp(15px,2vw,18px);
  color:#CBD5E1;
  max-width:680px;
  margin:0 auto 40px;
}
.hero-sub strong{color:#FFFFFF;font-weight:700}
.hero-cta{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;margin-bottom:64px}
.hero-metrics{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:24px;
  max-width:720px;
  margin:0 auto;
  padding-top:48px;
  border-top:1px solid rgba(255,255,255,.1);
}
.metric{text-align:center}
.metric-num{
  display:block;
  font-size:clamp(22px,3vw,32px);
  font-weight:900;
  font-family:'Inter',sans-serif;
  color:#FFFFFF;
  line-height:1.2;
}
.metric-label{
  display:block;
  font-size:12px;
  color:#94A3B8;
  margin-top:4px;
}

/* ============ Buttons ============ */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:16px 32px;
  border-radius:999px;
  font-weight:700;font-size:15px;
  transition:all .2s ease;
  cursor:pointer;border:none;
  white-space:nowrap;
}
.btn-icon{font-size:18px}
.btn-primary{background:var(--accent);color:var(--white)}
.btn-primary:hover{background:#2563EB;transform:translateY(-2px);box-shadow:0 8px 24px rgba(59,130,246,.4)}
.btn-outline{border:2px solid rgba(255,255,255,.3);color:var(--white)}
.btn-outline:hover{background:rgba(255,255,255,.1);border-color:var(--white)}
.btn-outline-light{border:2px solid rgba(255,255,255,.4);color:var(--white);background:transparent}
.btn-outline-light:hover{background:rgba(255,255,255,.1)}
.btn-line{
  background:#06C755;color:var(--white);
  flex-direction:column;
  padding:18px 40px;
  line-height:1.3;
}
.btn-line small{font-size:11px;opacity:.9;font-weight:500}
.btn-line:hover{background:#05B04C;transform:translateY(-2px);box-shadow:0 8px 24px rgba(6,199,85,.4)}
.btn-case{margin-top:32px;background:var(--white);color:var(--brand);border:2px solid var(--line-strong)}
.btn-case:hover{background:var(--bg-1);border-color:var(--accent);color:var(--accent)}

/* ============ Section base ============ */
.section-title{
  font-size:clamp(26px,4vw,40px);
  text-align:center;
  margin-bottom:20px;
  line-height:1.3;
}
.section-title-en{
  display:block;
  font-family:'Inter',sans-serif;
  font-size:13px;
  font-weight:700;
  color:var(--accent);
  letter-spacing:.2em;
  margin-bottom:12px;
}
.section-title-light{color:var(--white)}
.section-title-light .section-title-en{color:var(--accent-2)}
.section-lead{
  text-align:center;
  color:var(--text-sub);
  max-width:720px;
  margin:0 auto 64px;
  font-size:15px;
}
.section-lead strong{color:var(--text);font-weight:700}

/* ============ Problem ============ */
.problem{background:var(--bg-1)}
.problem-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(240px,1fr));
  gap:20px;
  margin-top:48px;
}
.problem-card{
  background:var(--white);
  padding:32px 24px;
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  border:1px solid var(--line);
}
.problem-icon{font-size:32px;margin-bottom:12px}
.problem-card h3{font-size:17px;margin-bottom:12px}
.problem-card p{font-size:14px;color:var(--text-sub);line-height:1.7}

/* ============ Service ============ */
.service{background:var(--white)}
.service-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(280px,1fr));
  gap:24px;
}
.service-card{
  background:var(--white);
  padding:40px 32px;
  border-radius:var(--radius-lg);
  border:1px solid var(--line);
  position:relative;
  transition:all .3s ease;
}
.service-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.service-card-feature{
  border:2px solid var(--accent);
  background:linear-gradient(180deg,rgba(59,130,246,.04),rgba(59,130,246,0));
}
.service-badge{
  position:absolute;top:-12px;right:24px;
  background:var(--accent);color:var(--white);
  padding:4px 14px;border-radius:999px;
  font-size:12px;font-weight:700;letter-spacing:.05em;
}
.service-num{
  font-family:'Inter',sans-serif;
  font-size:14px;
  font-weight:700;
  color:var(--accent);
  letter-spacing:.1em;
  margin-bottom:16px;
}
.service-card h3{font-size:22px;margin-bottom:16px}
.service-desc{color:var(--text-sub);font-size:14px;margin-bottom:24px}
.service-features li{
  padding-left:28px;
  position:relative;
  font-size:14px;
  margin-bottom:10px;
}
.service-features li::before{
  content:'✓';
  position:absolute;left:0;top:0;
  color:var(--accent-green);
  font-weight:900;
  font-size:16px;
}

/* ============ Reason ============ */
.reason{background:linear-gradient(135deg,#0F172A 0%,#1E293B 100%);color:var(--white)}
.reason-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(280px,1fr));
  gap:24px;
  margin-top:48px;
}
.reason-card{
  background:rgba(255,255,255,.03);
  border:1px solid rgba(255,255,255,.1);
  padding:40px 32px;
  border-radius:var(--radius-lg);
}
.reason-num{
  font-family:'Inter',sans-serif;
  font-size:40px;font-weight:900;
  background:linear-gradient(90deg,#60A5FA,#3B82F6);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  margin-bottom:16px;line-height:1;
}
.reason-card h3{font-size:20px;margin-bottom:16px;color:var(--white)}
.reason-card p{color:#CBD5E1;font-size:14px}
.reason-card p strong{color:var(--white);font-weight:700}

/* ============ Plan ============ */
.plan{background:var(--bg-1)}
.plan-heading{
  font-size:22px;
  text-align:center;
  margin:64px 0 32px;
  font-weight:700;
}
.plan-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(280px,1fr));
  gap:24px;
  margin-bottom:40px;
}
.plan-card{
  background:var(--white);
  padding:40px 28px;
  border-radius:var(--radius-lg);
  border:1px solid var(--line);
  text-align:center;
  position:relative;
  transition:all .3s ease;
}
.plan-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.plan-card-feature{
  border:2px solid var(--accent);
  background:linear-gradient(180deg,rgba(59,130,246,.05),#FFFFFF);
  transform:scale(1.02);
}
.plan-card-feature:hover{transform:translateY(-4px) scale(1.02)}
.plan-badge{
  position:absolute;top:-14px;left:50%;transform:translateX(-50%);
  background:var(--accent);color:var(--white);
  padding:6px 20px;border-radius:999px;
  font-size:12px;font-weight:700;letter-spacing:.05em;
}
.plan-name{font-size:18px;font-weight:700;margin-bottom:12px}
.plan-price{margin-bottom:8px;line-height:1}
.plan-price-num{
  font-family:'Inter',sans-serif;
  font-size:38px;font-weight:900;
  color:var(--brand);
}
.plan-price-unit{font-size:16px;color:var(--text-sub);margin-left:4px}
.plan-days{font-size:13px;color:var(--text-sub);margin-bottom:28px}
.plan-features{text-align:left;margin-bottom:28px}
.plan-features li{
  padding-left:24px;position:relative;
  font-size:14px;margin-bottom:10px;
}
.plan-features li::before{
  content:'✓';position:absolute;left:0;
  color:var(--accent);font-weight:900;
}
.plan-for{
  font-size:13px;color:var(--text-sub);
  padding-top:20px;border-top:1px solid var(--line);
  font-weight:600;
}

.plan-monthly{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(260px,1fr));
  gap:16px;
}
.plan-monthly-item{
  background:var(--white);
  padding:28px 24px;
  border-radius:var(--radius);
  border:1px solid var(--line);
}
.plan-monthly-feature{border:2px solid var(--accent-green)}
.plan-monthly-name{font-size:15px;font-weight:700;margin-bottom:8px}
.plan-monthly-price{
  font-family:'Inter',sans-serif;
  font-size:28px;font-weight:900;
  color:var(--brand);
  margin-bottom:16px;
}
.plan-monthly-price span{font-size:13px;color:var(--text-sub);font-weight:500;margin-left:4px}
.plan-monthly-item ul li{
  padding-left:20px;position:relative;
  font-size:13px;margin-bottom:8px;color:var(--text-sub);
}
.plan-monthly-item ul li::before{
  content:'・';position:absolute;left:0;color:var(--accent);
}
.plan-note{
  text-align:center;color:var(--text-sub);
  font-size:12px;margin-top:32px;
}

/* ============ Case ============ */
.case{background:var(--white)}
.case-main{
  max-width:900px;margin:48px auto 0;
  background:linear-gradient(135deg,#F8FAFC 0%,#EEF2F7 100%);
  padding:48px;
  border-radius:var(--radius-lg);
  border:1px solid var(--line);
}
.case-tag{
  display:inline-block;
  background:var(--brand);color:var(--white);
  padding:6px 14px;border-radius:6px;
  font-size:12px;font-weight:600;
  margin-bottom:16px;
}
.case-title{font-size:clamp(18px,2.5vw,24px);margin-bottom:32px;line-height:1.5}
.case-metrics{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:16px;margin-bottom:32px;
  padding:24px;
  background:var(--white);
  border-radius:var(--radius);
}
.case-metric{text-align:center}
.case-metric-num{
  font-family:'Inter',sans-serif;
  font-size:clamp(22px,3vw,32px);
  font-weight:900;color:var(--accent);
  line-height:1;
}
.case-metric-label{font-size:12px;color:var(--text-sub);margin-top:6px}
.case-points li{
  padding-left:28px;position:relative;
  margin-bottom:12px;font-size:14px;
}
.case-points li::before{
  content:'▶';position:absolute;left:0;
  color:var(--accent);font-size:11px;top:4px;
}

/* ============ Flow ============ */
.flow{background:var(--bg-1)}
.flow-list{max-width:760px;margin:48px auto 0}
.flow-item{
  display:flex;gap:24px;
  padding:28px 0;
  border-bottom:1px solid var(--line);
  align-items:flex-start;
}
.flow-item:last-child{border-bottom:none}
.flow-step{
  font-family:'Inter',sans-serif;
  font-size:12px;font-weight:700;
  color:var(--white);background:var(--accent);
  padding:6px 12px;border-radius:6px;
  flex-shrink:0;letter-spacing:.05em;
}
.flow-content h3{font-size:18px;margin-bottom:8px}
.flow-content p{font-size:14px;color:var(--text-sub)}

/* ============ FAQ ============ */
.faq{background:var(--white)}
.faq-list{max-width:820px;margin:48px auto 0}
.faq-item{
  background:var(--bg-1);
  border-radius:var(--radius);
  margin-bottom:12px;
  overflow:hidden;
  transition:all .2s ease;
}
.faq-item[open]{background:var(--white);box-shadow:var(--shadow);border:1px solid var(--line)}
.faq-item summary{
  padding:20px 24px;
  cursor:pointer;
  font-weight:700;font-size:15px;
  list-style:none;
  position:relative;padding-right:48px;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:'+';
  position:absolute;right:24px;top:50%;
  transform:translateY(-50%);
  font-size:24px;color:var(--accent);
  font-weight:300;transition:transform .2s ease;
}
.faq-item[open] summary::after{content:'−'}
.faq-item p{padding:0 24px 24px;font-size:14px;color:var(--text-sub)}

/* ============ CTA ============ */
.cta{
  background:linear-gradient(135deg,#0F172A 0%,#1E293B 100%);
  color:var(--white);
  text-align:center;
  position:relative;
  overflow:hidden;
}
.cta::before{
  content:'';
  position:absolute;inset:0;
  background:radial-gradient(circle at 50% 0%,rgba(59,130,246,.3),transparent 60%);
}
.cta > .container{position:relative;z-index:1}
.cta-title{
  font-size:clamp(24px,4vw,38px);
  margin-bottom:20px;
  line-height:1.5;
}
.cta-sub{color:#CBD5E1;margin-bottom:40px;font-size:15px}
.cta-buttons{
  display:flex;gap:16px;justify-content:center;
  flex-wrap:wrap;margin-bottom:24px;
}
.cta-note{color:#94A3B8;font-size:13px}

/* ============ Footer ============ */
.site-footer{background:#0F172A;color:#94A3B8;padding:64px 0 32px}
.footer-inner{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr;
  gap:48px;
  align-items:start;
}
.footer-brand .logo-text,.footer-brand .footer-logo{color:var(--white);font-weight:900;font-size:20px}
.footer-logo{display:flex;align-items:center;gap:8px}
.footer-logo .logo-tld{color:#64748B;font-size:13px;font-weight:500}
.footer-tagline{font-size:13px;margin-top:12px;color:#94A3B8}
.footer-nav{display:flex;flex-direction:column;gap:10px;font-size:14px}
.footer-nav a:hover{color:var(--white)}
.footer-meta{font-size:13px;line-height:2}
.footer-copy{margin-top:16px;color:#64748B}

/* ============ Fixed CTA (mobile) ============ */
.fixed-cta{
  display:none;
  position:fixed;bottom:0;left:0;right:0;
  z-index:50;
  background:var(--white);
  border-top:1px solid var(--line);
  padding:12px 16px;
  gap:12px;
  box-shadow:0 -4px 20px rgba(15,23,42,.1);
}
.fixed-cta-btn{
  flex:1;
  display:flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 8px;
  border-radius:12px;
  font-weight:700;font-size:14px;
  color:var(--white);
}
.fixed-cta-line{background:#06C755}
.fixed-cta-plan{background:var(--brand)}
.fixed-cta-btn span{font-size:18px}

/* ============ Responsive ============ */
@media (max-width:960px){
  .nav-desktop{display:none}
  .nav-toggle{display:flex}
  section{padding:72px 0}
  .hero{padding:80px 0 72px}
  .hero-metrics{grid-template-columns:repeat(2,1fr);gap:20px;padding-top:32px}
  .footer-inner{grid-template-columns:1fr;gap:32px;text-align:left}
  .footer-nav{flex-direction:row;flex-wrap:wrap;gap:20px}
  .case-main{padding:32px 24px}
  .case-metrics{grid-template-columns:repeat(2,1fr)}
  .fixed-cta{display:flex}
  body{padding-bottom:80px}
}

@media (max-width:560px){
  .container{padding:0 20px}
  .hero-cta{flex-direction:column;width:100%}
  .hero-cta .btn{width:100%;justify-content:center}
  .plan-card-feature{transform:none}
  .plan-card-feature:hover{transform:translateY(-4px)}
  .flow-item{flex-direction:column;gap:12px}
  .cta-buttons{flex-direction:column;align-items:stretch}
  .cta-buttons .btn{width:100%;justify-content:center}
}